Heat output from spreading and rifting models of the Taupo volcanic zone, New Zealand
type: Item
instance of: scholarly article
title: Heat output from spreading and rifting models of the Taupo volcanic zone, New Zealand
zbMATH Open document ID: 0990.86501
DOI: 10.1155/S1173912601000098
author: Graham J. Weir
published in: Journal of Applied Mathematics and Decision Sciences
publication date: 2002-08-18T00:00:00Z
full work available at URL: https://eudml.org/doc/121937
review text: Summary: A conceptual model of the Taupo Volcanic Zone (TVZ) is developed, to a depth of 25 km, formed from three constant density layers. The upper layer is formed from eruption products. A constant rate of eruption is assumed, which eventually implies a constant rate of extension, and a constant rate of volumetric creation in the middle and bottom layers. Tectonic extension creates volume which can accomodate magmatic intrusions. Spreading models assume this volume is distributed throughout the whole region, perhaps in vertical dykes, whereas rifting models assume the upper crust is thinned and the volume created lies under this upper crust. Bounds on the heat flow from such magmatic intrusions are calculated. Heat flow calculations are performed and some examples are provided which match the present total heat output from the TVZ of about 4200 MW, but these either have extension rates greater than the low values of about \(8 \pm 4\) mm/a being reported from GPS measurements, or else consider extension rates in the TVZ to have varied over time.
Mathematics Subject Classification ID: 86A60
Mathematics Subject Classification ID: 80A20
zbMATH DE Number: 1694896
MaRDI profile type: Publication
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description: scientific article; zbMATH DE number 1694896